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Finding the Fourth Proportional to 99,468.60, 137,268.41 and 54,147.88

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Solution

The fourth proportional to 99,468.60, 137,268.41 and 54,147.88 is: 74,725.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,468.60 : 137,268.41 = 54,147.88 : x
  2. Step 2: Convert to fraction form
    99,468.60/137,268.41 = 54,147.88/x
  3. Step 3: Cross multiply
    99,468.60x = 137,268.41 × 54,147.88
  4. Step 4: Simplify right side
    99,468.60x = 7,432,793,392.47
  5. Step 5: Solve for x
    x = 7,432,793,392.47/99,468.60
  6. Step 6: Final answer
    x = 74,725.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.